.collector {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 3;
  width: 2rem;
  height: 2rem;
  background-repeat: no-repeat;
  background-size: 2rem 2rem;
  background-position: 0 0;
  
  &.o {
    background-image: url(../../images/star_o.png);
  }

  &.full {
    background-image: url(../../images//star_full.png);
  }
}